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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 15, Iss. 14 — Jul. 9, 2007
  • pp: 8493–8506

Laser-induced (endo)vascular photothermal effects studied by combined brightfield and fluorescence microscopy in hamster dorsal skin fold venules

R. Bezemer, M. Heger, J. P. H. van den Wijngaard, S. R. Mordon, M. J. C. van Gemert, and J. F. Beek  »View Author Affiliations


Optics Express, Vol. 15, Issue 14, pp. 8493-8506 (2007)
http://dx.doi.org/10.1364/OE.15.008493


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Abstract

The putative features of the (endo)vascular photothermal response, characterized by laser-induced thermal denaturation of blood and vessel wall constituents, have been elucidated individually, but not simultaneously in dynamic, isolated in vivo systems. A hamster dorsal skin fold model in combination with brightfield/fluorescence intravital microscopy was used to examine the effect of laser pulse duration and blood flow velocity on the size of the thermal coagulum, its attachment behavior, and laser-mediated vasomotion. The size of the coagulum and the extent of vasoconstriction and latent vasodilation were proportional to the laser pulse duration, but pulse duration had no effect on coagulum attachment/dislodgement. Blood flow velocity exhibited no significant effect on the studied parameters. The (endo)vascular photothermal response is governed predominantly by laser energy deposition and to a marginal extent by blood flow velocity.

© 2007 Optical Society of America

OCIS Codes
(110.0180) Imaging systems : Microscopy
(170.0110) Medical optics and biotechnology : Imaging systems
(170.5380) Medical optics and biotechnology : Physiology
(180.2520) Microscopy : Fluorescence microscopy
(350.5340) Other areas of optics : Photothermal effects

ToC Category:
Medical Optics and Biotechnology

History
Original Manuscript: February 26, 2007
Revised Manuscript: May 25, 2007
Manuscript Accepted: May 30, 2007
Published: June 25, 2007

Virtual Issues
Vol. 2, Iss. 8 Virtual Journal for Biomedical Optics

Citation
R. Bezemer, M. Heger, J. P. H. van den Wijngaard, S. R. Mordon, M. J. C. van Gemert, and J. F. Beek, "Laser-induced (endo)vascular photothermal effects studied by combined brightfield and fluorescence microscopy in hamster dorsal skin fold venules," Opt. Express 15, 8493-8506 (2007)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-15-14-8493


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